The average weight of 100 employees in a company is 62 kg and that of the remaining 25 employees is 52 kg. Find the average weight of all the employees in the company.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 60 kg.
Average weight = Total weight/Total employees
Now,
The average weight of 100 employees = 62 kg
The sum of weight of 100 employees = 100 × 62 = 6200 kg
The average weight of 25 employees = 52 kg
The sum of weight of 25 employees = 25 × 52 = 1300 kg
Hence,
Average weight = (6200 + 1300)/(100 + 25)
⇒ 7500/125 = 300/5 = 60 kg